The Influence of Interference of Rubber Bushing on the Stiffness Characteristics of Anti-Roll Bar

The Anti-roll Bar is a critical component of the automobile suspension system. The stiffness of the Anti-roll Bar significantly impacts the suspension stiffness and is related to the interference of the rubber bushing. To obtain reasonable Anti-roll Bar stiffness and determine the appropriate amount of rubber bushing interference, a certain type of automotive lateral Anti-roll Bar model was established through ANSYS Workbench finite element analysis for the rubber bushing material using a Mooney–Rivlin two-parameter model simulation. A different amount of interference was set up between the rubber bushing and the various parts of the bushing. The overload simulation was performed to simulate the bushing in an overload state with a different amount of interference between the rubber bushing and the various parts of the bushing. The stresses of the three main parts of the Anti-roll Bar (the clamp, skeleton, and bushing) were analyzed in an overload state. The radial and torsional stiffness values of the Anti-roll Bar are analyzed under the interference state. The influence of interference fit variations in different mating parts on the radial and torsional stiffness of the Anti-roll Bar is studied. It is determined that the stiffness value of the Anti-roll Bar meets the requirements when the interference fit between the bushing and rod is 1 mm, the bushing-plate interference is 2 mm, and the interference fit between the bushing and clamp is 0.6 mm, provided that the strength requirements of each part are met. This study provides important reference significance for designing.